Gas burner



GAS BURNER Filed. April 2, 1937' Patented Mar. 22, 1938 UNHTED statesPATENT OFFIQ-E 1 Claim.

This invention relates to gas burners, and especially to the nozzles ordischarge and mixing outlets for such burners. The device isparticularly suitable for use with domestic .gas burners,

but is capable of use in other relations.

The object of the invention is to provide improved means for producingand insuring perfect combustion of the gas, with. a freedom from carbondeposits and requiring no cleaning or adjustment after installation.

The special object of the invention is to provide a gas and air mixingnozzle of the Venturi type with means for supplying secondary air to theflame, at the combustion point, which will insure a much hotter flamethan otherwise, as Well as complete combustion.

One form of the invention is illustrated in the accompanying drawing inWhich:-

Fig. 1 is a side elevation of the burner suitable for furnace use,provided with the improved nozzle. a

Fig. 2 is a front end view of the nozzle.

Fig. 3 is a rear endview.

Fig. 4 is a section on the line 4- 1 of Figs. 2 and 3. 7

Referring particularly to the drawing, 4 indicates a burner stand,supporting the pipe 12 which is connected to the gas supply pipe Ill anddelivers the gas into a manifold 3, from which as many jets or nozzlesmay be tapped ofi as may be desired to use in the furnace. Two nozzlesare shown in Fig. 1, each connected by a pipe 1 and bend 8 tothe nozzle5. Pilot lights H are provided supplied by tubes 6 from a chamber 2which may be supplied with constantgas through a tube 9. A plate Icovers the main parts of the burner, the nozzles projecting upwardlythrough openings in the plate at the edges thereof. These parts may beof any suitable or proper 40 construction and may be varied as desired,ac-

cording to the type of furnace or the type of burner.

The nozzle comprises a casting cored to form a tapered or Venturiprimary air passage l4. Thisreceives from the rear the gas supply pipe15 supported by cross piece or bracket 16 secured to or forming a partof the casting, and the pipe 15 connects with a supply branch I. At itsend within the air passage 14 the gas supply pipe is provided with a jettip H which may be of any suitable type to spray the gas into the airand create a Venturi effect and form a mixture between the jet tip andthe discharge outlet from the nozzle.

Also cored in the casting forming the nozzle is the secondaryair passageHi. This is arcuate in cross section and tapers from back to front, andis preferably formed on the lower or under side of the nozzle, and sodisposed so that its outlet Ell is directly below and adjacent to thedischarge outlet 2! of the main portion of the nozzle. The function andpurpose of the secondary or additional air supply passage 18 is toprovide at the combustion point or discharge orifice of the nozzle, thesecondary air, by an injector action being drawn upwardly into thecombustion stream and assisting in the combustion of the mixture issuingfrom the outlet 25.

This construction has been found to give very eificient action and tocorrect defects which have been found to exist in mixing nozzles of theordinary type.

Altho shown applied to a burner of a particular type, the nozzle iscapable of use with various other types of burners or furnaces. It isparticularly useful in conversion burners which are substituted forother burners or fire pots in domestic furnaces.

I claim: a

A combustion nozzle for gas burners comprising a unitary tapered castinghaving cored therein a tapered primary air passage circular in crosssection and leading to a cylindrical discharge tube with its axis inalinement with the axis of said air passage, and also having coredtherein a tapered secondary air passage arcuate in cross section andextending along one side of the said primary air passage and tube andterminating in a discharge outlet flush with the outlet from said tubeat the end of the casting, and a gas jet pipe supported within saidprimary air passage at the axis thereof and in line with the axis of thetube.

DORSE MAcINTYRE WATERS.

